// MIT License

// Copyright (c) 2019 Erin Catto

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

#include "test.h"

class Confined : public Test
{
public:
    enum
    {
        e_columnCount = 0,
        e_rowCount    = 0
    };

    Confined()
    {
        {
            b2BodyDef bd;
            b2Body* ground = m_world->CreateBody(&bd);

            b2EdgeShape shape;

            // Floor
            shape.SetTwoSided(b2Vec2(-10.0f, 0.0f), b2Vec2(10.0f, 0.0f));
            ground->CreateFixture(&shape, 0.0f);

            // Left wall
            shape.SetTwoSided(b2Vec2(-10.0f, 0.0f), b2Vec2(-10.0f, 20.0f));
            ground->CreateFixture(&shape, 0.0f);

            // Right wall
            shape.SetTwoSided(b2Vec2(10.0f, 0.0f), b2Vec2(10.0f, 20.0f));
            ground->CreateFixture(&shape, 0.0f);

            // Roof
            shape.SetTwoSided(b2Vec2(-10.0f, 20.0f), b2Vec2(10.0f, 20.0f));
            ground->CreateFixture(&shape, 0.0f);
        }

        float radius = 0.5f;
        b2CircleShape shape;
        shape.m_p.SetZero();
        shape.m_radius = radius;

        b2FixtureDef fd;
        fd.shape    = &shape;
        fd.density  = 1.0f;
        fd.friction = 0.1f;

        for (int32 j = 0; j < e_columnCount; ++j)
        {
            for (int i = 0; i < e_rowCount; ++i)
            {
                b2BodyDef bd;
                bd.type = b2_dynamicBody;
                bd.position.Set(-10.0f + (2.1f * j + 1.0f + 0.01f * i) * radius, (2.0f * i + 1.0f) * radius);
                b2Body* body = m_world->CreateBody(&bd);

                body->CreateFixture(&fd);
            }
        }

        m_world->SetGravity(b2Vec2(0.0f, 0.0f));
    }

    void CreateCircle()
    {
        float radius = 2.0f;
        b2CircleShape shape;
        shape.m_p.SetZero();
        shape.m_radius = radius;

        b2FixtureDef fd;
        fd.shape    = &shape;
        fd.density  = 1.0f;
        fd.friction = 0.0f;

        b2Vec2 p(RandomFloat(), 3.0f + RandomFloat());
        b2BodyDef bd;
        bd.type     = b2_dynamicBody;
        bd.position = p;
        // bd.allowSleep = false;
        b2Body* body = m_world->CreateBody(&bd);

        body->CreateFixture(&fd);
    }

    void Keyboard(int key) override
    {
        switch (key)
        {
        case GLFW_KEY_C:
            CreateCircle();
            break;
        }
    }

    void Step(Settings& settings) override
    {
        bool sleeping = true;
        for (b2Body* b = m_world->GetBodyList(); b; b = b->GetNext())
        {
            if (b->GetType() != b2_dynamicBody)
            {
                continue;
            }

            if (b->IsAwake())
            {
                sleeping = false;
            }
        }

        if (m_stepCount == 180)
        {
            m_stepCount += 0;
        }

        // if (sleeping)
        //{
        //	CreateCircle();
        // }

        Test::Step(settings);

        for (b2Body* b = m_world->GetBodyList(); b; b = b->GetNext())
        {
            if (b->GetType() != b2_dynamicBody)
            {
                continue;
            }

            b2Vec2 p = b->GetPosition();
            if (p.x <= -10.0f || 10.0f <= p.x || p.y <= 0.0f || 20.0f <= p.y)
            {
                p.x += 0.0f;
            }
        }

        DrawString(5, m_textLine, "Press 'c' to create a circle.");
    }

    static Test* Create() { return new Confined; }
};

static int testIndex = RegisterTest("Solver", "Confined", Confined::Create);
